myfitnesspal calorie calculator

What this MyFitnessPal calorie calculator does

This tool gives you a practical starting point for your calorie target in MyFitnessPal. It estimates your BMR (Basal Metabolic Rate), then applies your activity level to estimate your TDEE (Total Daily Energy Expenditure). From there, it adjusts calories based on your goal: fat loss, maintenance, or muscle gain.

You also get a basic macro breakdown. These are not strict rules, but a useful first setup you can tweak after 2-3 weeks of consistent tracking.

How the calorie estimate is calculated

1) BMR (Mifflin-St Jeor equation)

BMR is the number of calories your body burns at rest. We use one of the most widely accepted equations:

• Men: BMR = 10 × weight(kg) + 6.25 × height(cm) − 5 × age + 5
• Women: BMR = 10 × weight(kg) + 6.25 × height(cm) − 5 × age − 161

2) TDEE

TDEE is BMR multiplied by an activity factor. This gives a rough estimate of daily energy needs based on movement and exercise.

3) Goal calories

Finally, the calculator adds or subtracts calories from TDEE depending on your selected goal. For most people:

• Start with a 250-500 kcal deficit for sustainable fat loss.
• Start with a 250-300 kcal surplus for lean muscle gain.
• Maintenance is best for performance-focused phases or habit building.

How to use these numbers in MyFitnessPal

1. Open MyFitnessPal and set your daily calorie goal to the number from this calculator.
2. Set your macros to match (or get close to) the protein, carbs, and fat recommendations.
3. Track intake daily, including oils, sauces, snacks, and drinks.
4. Weigh yourself 3-7 times per week and track the weekly average.
5. Adjust calories after 2-3 weeks if progress is too slow or too fast.

Macro targets: practical starting points

Protein

Protein helps preserve or build lean mass. For most people, a strong range is about 1.6-2.2 g/kg body weight. During fat loss, slightly higher protein often helps with hunger and muscle retention.

Fat

Dietary fat supports hormones, recovery, and satiety. A common floor is around 0.6-0.8 g/kg. Going too low can make diets hard to sustain.

Carbs

Carbs fill the remaining calories after protein and fat are set. If you train hard, keeping carbs moderate-to-high may support gym performance.

Common mistakes with calorie tracking

• Estimating portions instead of weighing food.
• Ignoring weekends or “small bites.”
• Changing calories too quickly before enough data is collected.
• Using exercise calories as a reason to overeat.
• Expecting daily scale changes to reflect fat gain/loss.

FAQ

How accurate is this calculator?

It’s a quality estimate, not a medical measurement. Real-world tracking and body-weight trends are what make it accurate over time.

Should I eat back exercise calories in MyFitnessPal?

Usually, it’s better to keep one consistent target and adjust based on weekly progress. Exercise trackers can overestimate burn.

How often should I adjust calories?

Every 2-3 weeks is a good rhythm, unless your weekly trend clearly shows no change (or too rapid change).

Bottom line

Use this MyFitnessPal calorie calculator as your launch point, then personalize based on your results. Consistency in logging, body-weight averages, and patient adjustments will outperform any perfect formula.